2 // ExpressionTest_Negate.cs
5 // Jb Evain (jbevain@novell.com)
7 // (C) 2008 Novell, Inc. (http://www.novell.com)
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30 using System.Reflection;
32 using System.Linq.Expressions;
33 using NUnit.Framework;
35 namespace MonoTests.System.Linq.Expressions
38 public class ExpressionTest_Negate
41 [ExpectedException (typeof (ArgumentNullException))]
42 public void Arg1Null ()
44 Expression.Negate (null);
48 [ExpectedException (typeof (ArgumentException))]
49 public void MethodArgNotStatic ()
51 Expression.Negate (Expression.Constant (new object ()), typeof (OpClass).GetMethod ("WrongUnaryNotStatic"));
55 [ExpectedException (typeof (ArgumentException))]
56 public void MethodArgParameterCount ()
58 Expression.Negate (Expression.Constant (new object ()), typeof (OpClass).GetMethod ("WrongUnaryParameterCount"));
62 [ExpectedException (typeof (ArgumentException))]
63 public void MethodArgReturnsVoid ()
65 Expression.Negate (Expression.Constant (new object ()), typeof (OpClass).GetMethod ("WrongUnaryReturnVoid"));
69 [ExpectedException (typeof (InvalidOperationException))]
70 public void NegateBool ()
72 Expression.Negate (true.ToConstant ());
78 var up = Expression.Negate (Expression.Constant (1));
79 Assert.AreEqual ("-1", up.ToString ());
83 public void UserDefinedClass ()
85 var mi = typeof (OpClass).GetMethod ("op_UnaryNegation");
87 var expr = Expression.Negate (Expression.Constant (new OpClass ()));
88 Assert.AreEqual (ExpressionType.Negate, expr.NodeType);
89 Assert.AreEqual (typeof (OpClass), expr.Type);
90 Assert.AreEqual (mi, expr.Method);
91 Assert.AreEqual ("op_UnaryNegation", expr.Method.Name);
92 Assert.AreEqual ("-value(MonoTests.System.Linq.Expressions.OpClass)", expr.ToString ());
96 public void NegateNullableInt32 ()
98 var n = Expression.Negate (Expression.Parameter (typeof (int?), ""));
99 Assert.AreEqual (typeof (int?), n.Type);
100 Assert.IsTrue (n.IsLifted);
101 Assert.IsTrue (n.IsLiftedToNull);
102 Assert.IsNull (n.Method);
106 public void CompileNegateInt32 ()
108 var p = Expression.Parameter (typeof (int), "i");
109 var negate = Expression.Lambda<Func<int, int>> (Expression.Negate (p), p).Compile ();
111 Assert.AreEqual (-2, negate (2));
112 Assert.AreEqual (0, negate (0));
113 Assert.AreEqual (3, negate (-3));
117 public void CompiledNegateNullableInt32 ()
119 var p = Expression.Parameter (typeof (int?), "i");
120 var negate = Expression.Lambda<Func<int?, int?>> (Expression.Negate (p), p).Compile ();
122 Assert.AreEqual (null, negate (null));
123 Assert.AreEqual ((int?) -2, negate (2));
124 Assert.AreEqual ((int?) 0, negate (0));
125 Assert.AreEqual ((int?) 3, negate (-3));
131 public Slot (int value)
136 public static Slot operator - (Slot s)
138 return new Slot (-s.Value);
143 public void UserDefinedNegate ()
145 var s = Expression.Parameter (typeof (Slot), "s");
146 var node = Expression.Negate (s);
147 Assert.IsFalse (node.IsLifted);
148 Assert.IsFalse (node.IsLiftedToNull);
149 Assert.AreEqual (typeof (Slot), node.Type);
151 var negate = Expression.Lambda<Func<Slot, Slot>> (node, s).Compile ();
153 Assert.AreEqual (new Slot (-2), negate (new Slot (2)));
154 Assert.AreEqual (new Slot (42), negate (new Slot (-42)));
158 [Category ("NotWorkingInterpreter")]
159 public void UserDefinedNotNullableNegateNullable ()
161 var s = Expression.Parameter (typeof (Slot?), "s");
162 var node = Expression.Negate (s);
163 Assert.IsTrue (node.IsLifted);
164 Assert.IsTrue (node.IsLiftedToNull);
165 Assert.AreEqual (typeof (Slot?), node.Type);
167 var negate = Expression.Lambda<Func<Slot?, Slot?>> (node, s).Compile ();
169 Assert.AreEqual (null, negate (null));
170 Assert.AreEqual (new Slot (42), negate (new Slot (-42)));
171 Assert.AreEqual (new Slot (-2), negate (new Slot (2)));
174 struct SlotToNullable {
177 public SlotToNullable (int value)
182 public static SlotToNullable? operator - (SlotToNullable s)
184 return new SlotToNullable (-s.Value);
189 [ExpectedException (typeof (InvalidOperationException))]
190 public void UserDefinedToNullableNegateFromNullable ()
192 Expression.Negate (Expression.Parameter (typeof (SlotToNullable?), "s"));
196 public void UserDefinedToNullableNegateNullable ()
198 var s = Expression.Parameter (typeof (SlotToNullable), "s");
199 var node = Expression.Negate (s);
200 Assert.IsFalse (node.IsLifted);
201 Assert.IsFalse (node.IsLiftedToNull);
202 Assert.AreEqual (typeof (SlotToNullable?), node.Type);
204 var negate = Expression.Lambda<Func<SlotToNullable, SlotToNullable?>> (node, s).Compile ();
206 Assert.AreEqual ((SlotToNullable?) new SlotToNullable (42), negate (new SlotToNullable (-42)));
207 Assert.AreEqual ((SlotToNullable?) new SlotToNullable (-2), negate (new SlotToNullable (2)));
210 struct SlotFromNullable {
213 public SlotFromNullable (int value)
218 public static SlotFromNullable operator - (SlotFromNullable? s)
221 return new SlotFromNullable (-s.Value.Value);
223 return new SlotFromNullable (-1);
228 public void UserDefinedNegateFromNullable ()
230 var s = Expression.Parameter (typeof (SlotFromNullable?), "s");
231 var node = Expression.Negate (s);
232 Assert.IsFalse (node.IsLifted);
233 Assert.IsFalse (node.IsLiftedToNull);
234 Assert.AreEqual (typeof (SlotFromNullable), node.Type);
236 var negate = Expression.Lambda<Func<SlotFromNullable?, SlotFromNullable>> (node, s).Compile ();
238 Assert.AreEqual (new SlotFromNullable (-2), negate (new SlotFromNullable (2)));
239 Assert.AreEqual (new SlotFromNullable (42), negate (new SlotFromNullable (-42)));
240 Assert.AreEqual (new SlotFromNullable (-1), negate (null));
243 struct SlotFromNullableToNullable {
246 public SlotFromNullableToNullable (int value)
251 public static SlotFromNullableToNullable? operator - (SlotFromNullableToNullable? s)
254 return new SlotFromNullableToNullable (-s.Value.Value);
261 public void UserDefinedNegateFromNullableNotNullable ()
263 var s = Expression.Parameter (typeof (SlotFromNullableToNullable?), "s");
264 var node = Expression.Negate (s);
265 Assert.IsFalse (node.IsLifted);
266 Assert.IsFalse (node.IsLiftedToNull);
267 Assert.AreEqual (typeof (SlotFromNullableToNullable?), node.Type);
269 var negate = Expression.Lambda<Func<SlotFromNullableToNullable?, SlotFromNullableToNullable?>> (
272 Assert.AreEqual (new SlotFromNullableToNullable (-2), negate (new SlotFromNullableToNullable (2)));
273 Assert.AreEqual (new SlotFromNullableToNullable (42), negate (new SlotFromNullableToNullable (-42)));
274 Assert.AreEqual (null, negate (null));
278 public void NegateDecimal ()
280 var d = Expression.Parameter (typeof (decimal), "l");
282 var meth = typeof (decimal).GetMethod ("op_UnaryNegation", new [] { typeof (decimal) });
284 var node = Expression.Negate (d);
285 Assert.IsFalse (node.IsLifted);
286 Assert.IsFalse (node.IsLiftedToNull);
287 Assert.AreEqual (typeof (decimal), node.Type);
288 Assert.AreEqual (meth, node.Method);
290 var neg = Expression.Lambda<Func<decimal, decimal>> (node, d).Compile ();
292 Assert.AreEqual (-2m, neg (2m));
296 [Category ("NotWorkingInterpreter")]
297 public void NegateLiftedDecimal ()
299 var d = Expression.Parameter (typeof (decimal?), "l");
301 var meth = typeof (decimal).GetMethod ("op_UnaryNegation", new [] { typeof (decimal) });
303 var node = Expression.Negate (d);
304 Assert.IsTrue (node.IsLifted);
305 Assert.IsTrue (node.IsLiftedToNull);
306 Assert.AreEqual (typeof (decimal?), node.Type);
307 Assert.AreEqual (meth, node.Method);
309 var neg = Expression.Lambda<Func<decimal?, decimal?>> (node, d).Compile ();
311 Assert.AreEqual (-2m, neg (2m));
312 Assert.AreEqual (null, neg (null));